Zephyr Hollis is an underfed, overzealous social activist who teaches night school to the underprivileged of the Lower East Side. Strapped for cash, Zephyr agrees to help a student, the mysterious Amir, who proposes she use her charity worker cover to bring down a notorious vampire mob boss. What he doesn’t tell her is why. Soon enough she’s tutoring a child criminal with an angelic voice, dodging vampires high on a new blood-based street drug, and trying to determine the real reason behind Amir’s request — not to mention attempting to resist (often unsuccessfully) his dark, inhuman charm.